lm95221cimm-eng National Semiconductor Corporation, lm95221cimm-eng Datasheet - Page 12

• Manufacturer Part Number: lm95221cimm-eng
• Description: Dual Remote Diode Digital Temperature Sensor With Smbus Interface
• Manufacturer: National Semiconductor Corporation

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2.0 LM95221 Registers
2.1 STATUS REGISTER
2.2 CONFIGURATION REGISTER
Power up default is with all bits “0” (zero)
Bits
7
6-2
1
0
(Read Address 03h /Write Address 03h):
Bits
7
6
5-4
3
2
1
0
D7
0
(Read Only Address 02h):
Busy
D7
RUN/STOP
Name
Busy
Reserved
Remote diode 2 missing (RD2M)
Remote diode 1 missing (RD1M)
Name
Reserved
RUN/STOP
Conversion Rate (CR1:CR0)
Reserved
Remote 2 Data Format (R2DF)
Remote 1 Data Format (R1DF)
Reserved
D6
D6
0
CR1
D5
(Continued)
D5
0
Reserved
CR0
Description
When set to "1" the part is converting.
Reports "0" when read.
Remote Diode 2 is missing. (i.e. D2+ shorted to V
or D2+ is floating). Temperature Reading is FFE0h which converts to
255.875 ˚C if unsigned format is selected or 8000h which converts to
–128.000 ˚C if signed format is selected.
Remote Diode 1 is missing. (i.e. D1+ shorted to V
or D1+ is floating). Temperature Reading is FFE0h which converts to
255.875 ˚C if unsigned format is selected or 8000h which converts to
–128.000 ˚C if signed format is selected.
Description
Reports "0" when read.
Logic 1 disables the conversion and puts the part in standby mode.
Conversion can be activated by writing to one-shot register.
00: continuous mode 66ms, 15 Hz (typ)
01: converts every 200ms, 5 Hz (typ)
10: converts every 1 second, 1 Hz (typ)
11: converts every 3 seconds,
Note: typically a remote diode conversion takes 26 ms and local
conversion takes 14 ms.
Reports "0" when read.
Logic 0: unsigned Temperature format (0 ˚C to +255.875 ˚C)
Logic 1: signed Temperature format (-128 ˚C to +127.875 ˚C)
Logic 0: unsigned Temperature format (0 ˚C to +255.875 ˚C)
Logic 1: signed Temperature format (-128 ˚C to +127.875 ˚C)
Reports "0" when read.
D4
D4
0
12
D3
0
D3
0
D2
0
R2DF
1
⁄
D2
3
Hz (typ)
RD2M
D1
R1DF
D1
DD
DD
RD1M
D0
, Ground or D2-,
, Ground or D1-,
D0
0